SOLUTION: The radius of a circle is increased by 100%. By what percent was the area of the circle increased?

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Question 319451: The radius of a circle is increased by 100%. By what percent was the area of the circle increased?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Area is a function of the square of the radius.
2 times r --> 2^2 times area
= 4 times
= 300% increase